do88 S58 Transmission Cooler BMW G8X M2 M3 M4
Keep Your S58 Shifting Smoothly
Improve transmission durability and cooling on track and road with do88’s upgraded transmission cooler – designed to handle the extra heat generated by tuned G8X models without compromising shift speed or gearbox life.
Why Upgrade?
Overheating Risks in Tuned G8X Cars
The ZF 8HP automatic transmission fitted to the G87 M2, G80 M3, and G82 M4 is impressively capable – but like many OEM parts, its cooling system was not designed for extended track use or heavy tuning. With increased power and heat comes greater stress on the transmission cooler. Overheating can cause:
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Slower, less consistent gear changes
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Reduced transmission life
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Limp mode or transmission fault warnings
Key Features
Designed for Performance
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+71% increased core volume vs. OEM
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+50% increased cooling surface area
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Dual-pass flow for longer fluid residence time
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Upgraded harmonica-style tubes with internal channels for improved oil flow
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Optimised design with no increase in oil pressure
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42% increase in oil volume (850ml vs 600ml OEM)
Motorsport-Ready Construction
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Full aluminium construction for maximum strength and heat dissipation
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TIG-welded end tanks for long-term reliability
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OEM-style quick-connect fittings for hassle-free installation
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Fits without any vehicle modifications
Compatibility
Fits all S58-powered G8X models including:
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BMW G87 M2 (2023–202X)
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BMW G80 M3 / M3 Competition / M3 CS (2020–202X)
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BMW G82 M4 / M4 Competition / M4 CSL (2020–202X)
Supporting Upgrades Recommended
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do88 Engine Oil Cooler
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do88 Front Intercooler Radiator
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do88 Auxiliary Radiators (L+R)
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ECU software upgrades for gearbox temperature monitoring and tuning
Why Choose do88?
With Swedish precision and a focus on track-ready performance, do88 products are engineered to solve real-world problems. The S58 cooling system has known limitations – do88 fixes them with tested, CFD-developed solutions that are easy to install and built to last.
